Trimming-dies.



C. SONNEBORN.

TRIMMING DH'IS.

APPLICATlQN man APR. 1. 1914.

Patented Aug. 10, 1915.

4 SHEETS-SHEET I.

INVENTOR COLUMBIA PLANOGRAPH (IO-,WASHINGTON, D. c.

C. SONNEBORN.

TRIMMING DIES.

APPLICATION FILED APR. 1914.

Patented Aug. 10, 1915.

4 SHEETS-SHEET 2.

COLUMBIA PLANOURAPH cO..wAsl-1|NumN.D. c.

C. SONNEBORN.

TRIMMING DIES.

APPLICATION FILED APR. 1. 1914. 1,149,695. Patented Aug. 10, 1915.

4 S EETSAHEET 3.

fl J fix V. v wkmimmmimimllfi ,m'lm

INVENTOR WITNESSES 1,1&9,695.

C. SONNEBORN.

TRIMMING DIES.

APPLICATION FILED APR- I914.

Patented Aug. 10, 1915.

4 SHEETS-SHEET 4.

man

FIG-9 I INVE TOR sas arr rice.

CHARLES SONNEBOBN, OF WEST PITTSBURG, BEINNSYLVANIA, ASSIGNOB. T0 PRES SED METAL RADIATOR COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION or PENNSYLVANIA.

To all whom it may concern Be it known that 1, CHARLES a resident of West Pittsburg, in the county of Lawrence and State of Pennsylvania, have invented a new and useful Improvement in Trimming-Dies, of which the following is a specification.

This invention relates to dies for trrmming, shearing and punching sheet metal articles.

The object of the invention is to provide dies for this purpose by means of which a shaped sheet metal article can be accurately trimmed, Which are adjustable to adapt them for trimming and punching similar articles of different sizes, and which are formed in sections so that each part can be accurately shaped and the wearing parts readily replaced when worn.

In the accompanying drawings, Figure 1 is a face view of the bottom die; Fig. 2 is a similar view of the top die;-Fig. 3 is a lon gitudinal section through both dies on the line 3-3, Figs. 1 and 2; Fig. a is a transverse section through the same onthe line H, Figs. 1 and 2; Fig. 5 is a detail section through the bottom die on the line 5-5, Fig. 1; Fig. 6'is a detail section through the top" die on the line 66, Fig. 2; Fig. 7 is a detail view of a washer; Fig. 8 is a View corre-' sponding to Fig. l and showing a modification; and Fig. 9 is a detail view of the boss flanging dies used in the form shown in Fig. 8. I

The dies illustrated are adaptedto be actuated by any suitable press, the bottom die being suitably secured to the frame or bed of the press and the top die being carried by the vertically movable platen or press bed. The means for securing Pthese dies to the press bed and platen may be'varied within Wide limits.

Both the top and bottom dies are of sectional or built up construction for the purpose of adjustability, accuracy of construetion and readiness of replacing worn parts. The dies have been illustrated for trimming the edges of formed sections for' sheet metal radiators, and punching holes in'embossed portions thereof. for the pipe connections,

and will be described in connectionvvith such use, although it is obvious-that the principal construction may be, adapted for trimming and punching various articles.

As illustrated, the bottom die 1 comprises Specification of Letters Patent.

SONNEBORN,

TRIMMING-DIES.

Patented Ang. a0, 1915.

Application filed April 1, 1914. Serial No. 828,869.

a pair of end sections or pieces2 and one or more intermediate pieces or sections 3, depending upon the length of the article being trimmed. By moving the end sections farther apart andfinterpos'ing between the same a larger number of intermediate sections, or an intermediatesection of greater length, the die can be increased in length within limits to the desired extent. Each end section 2 comprises the main body or web portion l, which is a comparatively thin plate, and has a thickened portion 5 extending widthwise of the web portion 4 and upon which in turn rests a'plate 6, which is suitably secured thereto by tap bolts 7 extending up through openings from the bottom of the body portion and entering said plate 6. The. thickened portion 5 is provided on opposite sides of its longitudinal center with upwardly extending portions 8 which extend from the plate 6 to the inner straight edge of the end section, and which portions 8 are provided with transverse slots 9 for. a purpose hereinafter described. The outer portion of the plate 6 is formed into or is provided with a shearing ,or trimming blade or knife 10, which extends crosswise'of the die member and edits ends is curved and terminates at the edge of the plate 6, and which serves to trim the curved end portion-of the radiator section. The outer or side faces of the upwardly projecting portions 8 form seats 11 for the ends of the lateral or side knives or shears 12, which are secured in place by means of tap boltsf13 which extend through the slots-9 in the projecting portions 8 and enter tapped holes in the knives 12. The intermediate sections 3 are also provided with lateral upwardly:projectingportions 14 provided with transverse slots 15 and having their outer or side faces forming seats 16 for the knives 12, which are also secured to the intermediate sections by similar bolts 13 projecting. through the slots 15 andentering tapped holes in the knives. By havingthe slots 9 and 15 open at their up per ends the side knives canbe readily removed without entirely removing the bolts 13. Preferably, a single long knife is used at each side-of the die to secure a clean, even r The plates 6 are secured tothe body or base of the end sections by means of tarespectively. This gives absolute position to the plate 6 and its knife portion 10. The plate 6 is provided on the central longitudinal line of the die with an opening 20 which is slightly undercut on the lower face of the plate, as at 21, for receiving the fe male punching die 23, which is entered from the bottom through the opening in said plate before the latter is secured in position and is provided with a collar at its lower end which fits in the undercut portion 21 in the plate and prevents the die from becoming displaced. This die is provided with a central opening 25 for receiving the punch hereinafter described carried by the upper die, which opening is in alinement with an opening 26 through the body of the end section. Surrounding the die member 23 is a centering ring 28 for entering the embossed portion of the previously formed radiator section and properly centering and positioning the same. This ring fits over the die 23 and is provided with a pair of diametrically opposite tapped holes for receiving short bolts 29 whose inner ends project into vertical slots 30 in the die 23. The ring 28 also carries a plurality of pins 31 (four such pins being shown) which loosely enter corresponding holes 32 in the plate 6 and which pins are surrounded by springs 33 for forcing said ring yieldingly outwardly.

The die sections 2 and 3 are secured to a suitable base or bolster plate 34, which latter plate is provided with threaded holes for receiving tap bolts 35 extending through holes 36 in the webs of the end and intermediate sections 2 and 3. The base plate is provided with a longitudinal seat or groove 38 for receiving and interlocking with a guide strip 39 which also enters correspond ing grooves orseats 40 in the bottom faces of the end-and intermediate sections 2 and 3, said guide plate being secured to the die sections by suitable tap bolts 41. This bolster or base plate is also provided with a series of openings 42 with which the openings 26 of the end die sections register for the discharge of the punched out metal. The die is assembled on the bolster plate and will be secured to the frame or bed plate of the press by any suitable means. The top die 45 comprises two end sections 46 and one or more intermediate sections 47 which as in the case of the bottom die are divided on straight transverse lines so that any number of intermediate sections of any length, within limits, can be assembled between the two end sections to build up a die of various lengths. Each end section comprises the body or web portions 48 which is comparatively thin, and which has projecting downwardly therefrom a thickened portion 48 which has a vertical wall 49 extending transversely of the die and then curving and having the two ends extending longitudinally of the die, and which wall forms a securing portion for the cutting or shearing knives, the latter resting upon the seat 50. The wall portion 48 is provided with holes 51 therethrough which are noncircular, or elongated vertically for receiv ing securing bolts 52 for securing'the knives or shear members in place. The intermediate sections 47 are provided with vertically projecting portions 53 having their inner faces forming vertical. walls 54 terminating in a wall 55 forming a seat for the side shearing members orblades, and are like wise provided with transverse oblong openings 56 therethrough for receiving securing bolts A pair of shearing blades 57 are secured to each end section, each blade extending from the central longitudinal line of the die around the curved portion The side shearing blades or knives 58 are straight, and are secured to the projections 53 of the intermediate sections with their ends extending onto the seats 50 of the end sections, and meet the ends of the curved knives 57, as will be readily understood. These knives can be very readily removed and renewed when worn. The knives 57 and 58 of the upper die cotiperate with the knives 10 and 12 of the lower die, to trim the periphery of the radiator or other section.

The upper die sections are secured to a suitable base or bolster plate 60, being secured thereto by means of bolts 61 extending through holes in the web portions of the die sections and entering tapped holes in the bolster plate, and are held in proper alinement and relative position by means of an interlocking guide strip 62 fitting in alining grooves formed respectively in the back face of the die sections and face of the base or bolster plate, and secured to the die sections by means of tap screws. The end sections 46 are provided with side lugs 63 having therein open slots 64 for receiving the longitudinal tie rods 65 serving as a means for clamping the die sections together against longitudinal displacement. The end sections 46 are provided at the central longi tudinal line of the die with holes 66 for receiving the male punching dies 67 which are inserted from underneath and provided with collars at 68 at their lower ends to hold the same against displacement, and which cotipera-te with the female dies 23 of the lower die. The top die is provided with a stripper or knock-out plate 70, "which is provided with openings-71 through which the punches 67 project. This stripper or knock-out plate is suspended from the upper die by means of retaining pins 72 extending down through openings 73 in the end sections 46, bein punching provided at their lower ends with heads 74 to prevent the plate from dropping down and having a suitable retaining washer 74 on their upper ends, this washer having its opening slotted out to its periphery on one side so that it can be slipped over a neck on the end of the retaining pin. Helical springs 80 seated in openings 81 in the several die sections and acting against the back of the stripper plate serve to depress the stripper or knock-out plate to strip the punched radiator section from the punches.

The dies are caused to reciprocate in exact alinement with each other by means of four guide pins 75 which are secured by means of set screw 76 in holes 77 in the end sections of the upper die, and which project down into accurately alined holes 7 8 formed in bosses 7 9 on the end sections of the lower die.

The dies described are of sectional construction so that they can be adjusted to trim sections of Various lengths, by merely taking out certain ones of the intermediate sections and replacing them by intermediate sections of different length or a different number of intermediate sections, or leaving the intermediate sections out entirely. The sectional construction also adapts the wear ing portions to be renewed as necessary and also to be replaced by working members of different vsize or form. The' manner of building up the dies enables them to be very accurately constructed so as to produce absolutely uniform sheared and punched sections.

It is obvious that the construction of dies described can be adapted to trim and punch articles of various forms and kinds. Instead of having the dies constructed to shear and punch the metal, exactly the same construction may be utilized for pressing or flanging the metal, by merely changing the working parts. For instance, Figs. 8 and 9 show the dies modified to press flanges on the edges of the blank, instead of shearing the same, and to flange the openings punched in the blank. As here shown, the knives 12 are replaced by a forming bar 12 and the knives 58 by a coeperating forming bar 58 which when the dies come together, press the edges of the blank to the form of the space between the coiiperating forming bars 12 and 58. Also, in this modification the female punching die 23 is replaced by the female flanging die member 2 provided with a hole 23* therethrough and having its face of substantially the configuration of the boss previously pressed in the sheet metal article. The male member or punch 67 is in this case replaced by a flanging punch 67 of such size that it will pass into the opening 23 of the female flanging member and form a flange around the punched hole of the boss on the radiator section. In this modification the stripper plate 70 is replaced by a pair of stripping rings 70? which have a sliding fit on the shanks of the flanging punches 67 and have their-outer faces formed to the configuration of the pressed boss in the radiator section, and which are normally pressed outwardly by suitable springs 7 6*.

What I claim is 1. A die comprising end sections and one or nio're changeable intermediate sections arranged to form a continuous structure therewith, the end sections each comprising a web and a plate secured thereto and having its edge arranged to act as a die member, the intermediate sections forming an unbroken surface internally of the die and having projecting portions forming seats and die members secured to said seats and matching the die members of the end sections, a back or body plate to which said end and intermediate sections are secured, and interlocking guide members engaging registering grooves in'the front face of said back or body plate and in the back faces of said sections.

2. A die comprising end sections and one or more changeable intermediate sections arranged to form a continuous structure therewith, the end sections each comprising aweb and a plate secured thereto and having a detachable edge portion arranged to act as a die member, the intermediate sections being arranged to abut closely against the web portions of said end members and having projecting portions forming seats and provided with transverse elongated openings, detachable die members fitting said seats, securing devices extending through said openings and arranged to hold said die members to their seats, said detachable die members matching the die members of the end sections, a back or body plate to which said sections are secured, and interlocking guide members engaging registering grooves in the front face of said back or body plate and in the back faces of said sections.

3. A die comprising end sections and one or more changeable intermediate sections, the end sections each comprising a web and a plate secured thereto and having its edge arranged to act as a die member, the intermediate sections having projecting portions forming seats and having die members secured to said seats and matching the die members of the end sections, a back or body plate to which said end and intermediate sections are secured, and interlocking guide members engaging registering grooves in .the front face of said back or body plate and in the back faces of said sections, said end sections being provided with ears or lugs, and longitudinal tie rods connecting the opposite ends sections and securing the end and intermediate sections together.

4. A die member comprising end sections and one or more changeable intermediate sections, the end sections each comprising a web and a plate secured thereto and having its edge portion arranged to act as a die member, said plate being provided With an aperture counterbored on the back face of said plate, a cylindrical die member projecting from said plate and having a collar fitting the counterbored portion of said aperture, said intermediate sections having projecting portions forming seats and having die members secured to said seats and matching the die members of the end sections, a back or bodyplate to which said sections are secured, and interlocking guide members engaging registering grooves in the front face of said back or body plate and in the back faces of said sections.

5. A die member comprising end sections and one or more changeable intermediate sections, the end sections each comprising a web and a plate secured thereto and having its edge portion arranged to act as a die member, said plate being provided with an aperture counterbored on the back face of said plate, a cylindrical die member projecting from said plate and having a collar fitting the counterbored portion of said aperture, said intermediate sections having projecting portions forming seats and having die members secured to said seats and matching the die members of the end sections, a back or body plate to which said sections are secured, and interlocking guide members engaging registering grooves in the front face of said back or body plate and in the back faces of said sections, a stripper plate yieldingly connected to the face of said die and slidingly mounted upon said cylindrical die members, and retaining pins connected to said die for supporting said stripper plate.

6. A pair of trimming dies each comprising end sections and one or more changeable intermediate sections, one of said dies being provided with a plurality of apertures and the other of said dies being provided with fixed dowel pins arranged to enter said apertures and accurately register said dies, the end sections of said dies each comprising a web and a plate secured thereto and having an edge portion arranged to act as a die member, the intermediate sections having projecting portions forming seats and having die members secured to said seats, and matching thedie members of the said sec tions, a back or body plate for each of said dies and to which the sections thereof are secured, and interlocking guide members engaging registering grooves in the front face of each back or body plate and in the back faces of its die sections.

In testimony whereof, I have hereunto set my hand.

CHARLES SONNEBORN.

Witnesses:

WIL IAM B. WHARTON, ELBERT L. HYDE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. i 

